can someone please help me how to unlock or unblock my mobile. It is a sony ericsson k700i on vodafone(which was a big mistake) but i want to be able to set mp3's as ringtones dos this mean i will have to unblock or unlock it? can someone please help

You cannot "unlock" the phone but rather have it reflashed with the standard off the shelf firmwares. this will remove all the Vodafone C**P and make it a factory spec sony-ericsson.. the man you need is "Muppet" whom is on these forums,There may be a fee involved but it's sure worth it. Good Luck!

1) Any valuable data on your phone might be erased. It may not, but back it up just to be sure. (Vodafone can help with this)

2) Advise your nearest vodafone outlet that your phone requires a software upgrade from a service center because it cannot play mp3s as ringtones. If your phone is under warranty then the service charges are free. If your warranty has expired you're looking at around $80-90 for the software upgrade which may not be worth the cost (depends how badly you want this feature I suppose.)

The service center is a busy place, so the time your phone is gone will vary depending on how much work they have to do on other phones. It took them about 12 business days before I got my phone back, but maybe that was just a busy time? Anyway, Vodafone will lend you one of their cheap $99 mobile phones if you ask until you get your one back.

3) When your phone is returned, encode your mp3s to .DM content using DRM Packager.
4) Transfer the .DMs to your phone.
5) You can now play these as ringtones. (normal mp3s won't work, but DM protected mp3s will.

Note: If you do borrow a phone, remember to erase any important txt/sms messages you send or receive. The next borrower will be able to access these messages if you don't erase them.

Or just get Muppet to do it and scrub the Vodafone junk forever...., the cost i'm sure will be much less too.

Also the service agent will rip your phone apart and "assess" it for damage and simply say "liquid damage" and ask for a $60 fee and do nothing.
And usually not put it back together right, the screws in mine were all loose so I tightneded them up and the phone worked flawlessly after that for 5 years (and still goes) You have been warned.